root/include/linux/rational.h

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/*
 * rational fractions
 *
 * Copyright (C) 2009 emlix GmbH, Oskar Schirmer <oskar@scara.com>
 *
 * helper functions when coping with rational numbers,
 * e.g. when calculating optimum numerator/denominator pairs for
 * pll configuration taking into account restricted register size
 */

#ifndef _LINUX_RATIONAL_H
#define _LINUX_RATIONAL_H

void rational_best_approximation(
        unsigned long given_numerator, unsigned long given_denominator,
        unsigned long max_numerator, unsigned long max_denominator,
        unsigned long *best_numerator, unsigned long *best_denominator);

#endif /* _LINUX_RATIONAL_H */
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